While this looks like a ‘brainless’ depiction of a surfactant protein D dodecamer, it really is the result of looking at many many images, counting peaks, estimating peak number from CRD to CRD in a hexamer, and i am pretty sure its quite realistic from the perspective of what is shown using AFM.  I challenge anyone to work out (from actual images) a better diagram.  15 peaks per hexamer, 8 peaks per trimer.  Please let me know when you have succeeded.  Reminds me of a comment i made to someone at UC, working on this protein when he created the most rediculous diagram of a dodecamer of SP-D, he bragged that it was “artistic license”. no such license exists when depicting science.  THIS IS NOT artistic license, it is the culmination of a lot of work, but rendered with “street art” flavor.